We've all seen marsh harriers quartering fields or reedbeds, dropping down every so often and sometimes coming back up with a small and unfortunate prey item. What I'd not seen before was a marsh harrier doggedly persuing a single target for minutes on end like a total bastard.
I first picked it up hovering low over the water between the causeways. Nothing unusual about a marsh harrier at Abberton, but the light was great so I stopped to watch. He didn't stray far from one area, concentrating hard on the water, periodically diving, sometimes grabbing at the surface. For a while it almost looked like he was fishing, but I kept getting glimpses of something breaking the surface and going back under to avoid the harrier as it dove. This continued for around 5 minutes. It was hard to get an eye on whatever it was he was after - he came down on it hard and fast each time it took a split-second breath - but eventually the target, which turned out to be a teal, made the mistake of straying into shallow water. The harrier dropped on to it like a stone, standing on it and holding it under the water for a good half a minute, wings held upright in the air to keep them dry. When he took off again he was pretty soggy and it took a couple of attempts to get himself and the waterlogged teal airborne. He flew a few metres and flopped into the nearby long-grass to properly finish ruining the teal's day.
Pictures are all enlargeable. (And slightly blurry.)
I first picked it up hovering low over the water between the causeways. Nothing unusual about a marsh harrier at Abberton, but the light was great so I stopped to watch. He didn't stray far from one area, concentrating hard on the water, periodically diving, sometimes grabbing at the surface. For a while it almost looked like he was fishing, but I kept getting glimpses of something breaking the surface and going back under to avoid the harrier as it dove. This continued for around 5 minutes. It was hard to get an eye on whatever it was he was after - he came down on it hard and fast each time it took a split-second breath - but eventually the target, which turned out to be a teal, made the mistake of straying into shallow water. The harrier dropped on to it like a stone, standing on it and holding it under the water for a good half a minute, wings held upright in the air to keep them dry. When he took off again he was pretty soggy and it took a couple of attempts to get himself and the waterlogged teal airborne. He flew a few metres and flopped into the nearby long-grass to properly finish ruining the teal's day.
Pictures are all enlargeable. (And slightly blurry.)
| Repeatedly hovering and diving at teal, just visible behind mallards.. |
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| ... again and again, ignoring all the other potential lunches... |
| ... finally landing on target teal and holding wings above the water... |
| ... before managing to take off, after a considerable effort. |
I've never seen a harrier doing something like this before, so I've no idea if this kind of lengthy and determined hunt is a regular thing. I assume he was deliberately targetting the one bird over and over to tire it out but it looked like a very effort-intensive way of doing this, with the long minutes spent hovering, diving, getting mobbed and finally standing chest-deep in water. There were plenty other waterfowl in the area he was hunting that, while flighty, weren't actively taking flight and I'd have thought there were probably other easier targets than this one. Or maybe, being a relatively small bird, the harrier decided that a mallard-sized meal represents enough of a challenge that sticking with a longer pursuit for a smaller prey item was worth it. I guess individual harriers might have favoured prey items and hunting strategies. His mind was clearly made up and eventually it did pay off. A very entertaining and impressive few minutes.
The weather made the visit thoroughly enjoyable, even if it was fairly quiet. I finally caught up with a smew, a single redhead between the causways, and a couple of white-fronts were hiding in with the greylags. Loads of presumably local buzzards were up enjoying the weather, with one of two birds flying much higher with a bit more purpose that I assume were just passing through. A handful of goosanders were scattered around and another pair of marsh harriers with a darker male were soaring over the main body as seen from the old visitor centre drive. There was nothing of note up at Abberton Church.
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The weather made the visit thoroughly enjoyable, even if it was fairly quiet. I finally caught up with a smew, a single redhead between the causways, and a couple of white-fronts were hiding in with the greylags. Loads of presumably local buzzards were up enjoying the weather, with one of two birds flying much higher with a bit more purpose that I assume were just passing through. A handful of goosanders were scattered around and another pair of marsh harriers with a darker male were soaring over the main body as seen from the old visitor centre drive. There was nothing of note up at Abberton Church.
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Went to Whipsnade yesterday with the last of the Girl's free tickets. Because zoos are awesome. Took the old camera lens, a cheap 75-300mm, which functioned perfectly, taking crisper pictures than it ever had done before. So I guess the problem, visible in the marsh harrier pictures above, is with the 400mm rather than the body. Which is annoying. I'd still like to try the 400mm with a different body, but it looks like I'm set up for a big old repair bill either way.










